Hi @Tim Edwards , possible to use analog GPIO 3v3 PAD input mode for a 3v3 voltage supply for user area ? i would actually need two configurable 18.V to 3.3V voltage supply. So vdda1 will be for the 3v3 constant logic , vdda2 could be the other one. Can a analog GPIO 3v3 PAD be used for the power supply purpose for a small logic ? Thanks

If it's not drawing much current and the 150 ohm resistor in series is not a problem, then you could. Probably better to use vccd2 for that purpose. Would that be a 1.8V or 3.3V logic block? The low voltage clamp on the vccd2 input would not be ideal, but I don't think it would cause any functional issue.

@Tim Edwards the voltage could change from a minimum of 1.5 to 3.3V , If the vccd2 pad is good enough for this, then i think i can use the vccd2.

Send me a reminder tomorrow, and I'll check on one of my boards that I can raise vccd2 to 3.3V without anything bad happening. It is possible that the low voltage clamp is not designed to take 3.3V. I will also look at the spec for the I/O pad and the circuit for the low voltage clamp.

Hi @Tim Edwards , gentle reminder